In reply to Eric.

I assume that you are doing some comparison such as the odds that the control group gets a disease as compared to the experimental group.
If no one in the experimental group contracted the disease, then the (empirical) odds are getting the disease in the control group is infinitely greater compared to the experimental group. The infinity is coming from the zero count.

In general, questions about how to present results should be directed to a journal's editor or associate editor. The SAS value "> 999.99" is a shorthand for "very large or infinite."